Excelent guide written by Jeff David aka "Korzic" on http://www.gamefaqs.com/pc/979864-ys-i-and-ii-chronicles/faqs/67237
I'm not taking any credit for this guide! Just uploading it to ease using a complete walkthrough...

Modding Ys 2 to replace the PC-88 music with the TurboGrafx-16 music (or any music you want)

av rpryke

Do you miss the TG-16 soundtrack when you play Ys? Or perhaps you've never experienced it before.
This guide will show you how to change the music from the PC-88 music to the TG-16 music.
I also cover how to change the other OST options as well.
T...

Ys II Analog Controller Bug Fix

av BluPhoenix

Steps to correct a non-functional left analog stick when playing Ys II with a gamepad....